How To Test Your Fuel Injectors In Just 30 Minutes

how to change injectors

The function of your diesel fuel injection system relies on careful maintenance. Fortunately, much of this maintenance you can do at home. By testing your fuel injectors at home, you can determine when you need to replace them. Then, if you know how to change injectors, you can install these replacements at home as well. Follow these steps to test your injectors for function and condition.

Step 1: Gather your tools.
To test your injectors, you will need only a few tools that you likely already have in your home. First, you will need to find proper safety gear, including gloves and eye protection. For your actual mechanical tools, you will need a foot-long metal rod or a screwdriver. You will also need an automotive test light.

Step 2: Use your senses.
Start your car’s engine. Take your metal rod or screwdriver and place it on a fuel injector. Carefully lean your head close enough to the rod so that you can hear its vibrations, but not so close that you are near the engine. If the injectors are activating, you should be able to hear a clicking sound.

Step 3: Switch on your battery.
Next, you need to check the system’s electrical connection. Switch the engine off so that it is not running but the battery is still activated. The radio, lights, and other electronic features should be active but not the engine.

Step 4: Use a test light.
Connect the clip of your test light to the negative terminal of your battery. Then, take the pointed tip of the test light and touch it to the small bit of exposed wire. The testing light should light up when it touches the wire. Repeat this on every injector.

Step 5: Decide on a next step.
Once you determine whether your injectors are functioning or not, decide if you are going to repair or replace them. If you know how to change injectors, perform this process at home. If not, bring them to your mechanic.

Remember that there any many different factors that can cause injectors to fail. For example, two major deposit buildups, external and internal injector deposits, often cause them to not function. Try to identify the underlying issue so you can prevent a failure in the future.

Remanufactured vs. Refurbished Diesel Fuel Injectors: What Truck Owners Should Know

When it comes to taking care of your vehicle, choosing the right parts is key. And that is especially important when it comes to fuel delivery. For diesel trucks, it’s all about the fuel injectors. By installing the best injectors, your fuel can be delivered at the right moment with full efficiency.

For many diesel truck owners looking to select the best injectors, remanufactured and refurbished models are available options. While they are an affordable alternative to new models, they may not perform exactly the same.

So, which should you choose for your truck? By understanding the key differences between these two types of injectors, you can then select which is best for your car’s needs.

Your first options are remanufactured diesel injectors. These models are actually returned to their original equipment manufacturer (OEM) performance. And to add to the perks, these models often come with a warranty that is either the same or better than new products. You can also rest assured that you are getting a quality value, since 100% of the parts are examined and pre-qualified.

On the other hand, truck owners can also purchase refurbished fuel injectors. These are essentially secondhand products, as they are taken from a high milage engine. Unlike remanufactured models, they are not inspected or repaired. This is because they are refurbished to look like new, but the parts may not be redone. These products generally come with a one-year warranty.

Ultimately, many truck owners turn to remanufactured models, and it’s no question why. The automotive, mining, and aerospace industries make up over 50% of remanufacturing. And on top of that, the United States is the largest consumer exporter of remanufactured goods in the world. In fact, it added up to a $43 billion industry in 2011, supporting at least 180,000 jobs.

Not only are you supporting jobs by choosing remanufactured car parts, but you are also caring for the environment. These products can save millions of tons of natural resources and stop landfills from piling up. With these auto parts having multiple lives, the global remanufacturing industry is estimated to hit $140 billion by 2020.

By purchasing remanufactured injectors, you can be part of this growth and environmental impact.

Common Fuel Injector Problems Specific To Duramax Models

duramax performance injectors

Every model of diesel fuel injectors has its own set of problems, and Duramax injectors are no exception. Even the most updated and efficient models can have issues, so it’s important for owners to know when their system needs repair. The following are some of the most common problems that shops notice when servicing this type of injector system. By being aware of these issues, you can get your car fixed when you need to and keep your Duramax performance injectors running like new.

    • Overheating: Earlier Duramax models most often experience overheating, particularly during warmer times of the year. In injection systems, this issue is usually caused by a faulty fan clutch, so fixing that part usually does the trick. But keep in mind that problems with the rest of the system can also cause overheating, so you should take your vehicle to a professional.


    • Head Gasket Damage: Duramax gaskets have multiple layers. When the gasket is performing well, the layers separate to release coolant and exhaust. If they don’t, these substances can get caught up and cause problems. Your mechanic will inspect the radiator hose for clogs as a clue of head gasket issues.


    • Fuel Line Issues: This type of injection system tends to be vulnerable to fuel line issues. This includes fuel starvation, in which fuel is not able to properly enter the line. Sometimes air gets into the fuel lines as well. When small cracks form in the line, you might experience these problems.


    • Glow Plug Failure: When the glow plug system actually functions faster than the glow plug, the tip of the plug might break. This is less of a risk in newer models since GM actually fixed the problem. But if you have a 2006 model, you should watch out for this. It could cause serious engine damage.


  • Water Pump Leaks: When the water pump is damaged, water actually leaks underneath. This can create quite a mess and should be changed as soon as possible. Be sure to bring it to a professional for this, as it can be difficult to remove the surrounding parts.

Duramax performance injectors are one of the most popular injection models. Since diesel fuel is 25% to 30% more energy rich than gasoline, owners should choose to maintain their systems to the best of their ability. This will keep the fuel running smoothly, encouraging optimal truck performance.

Forget What You Thought You Knew: 3 Diesel Myths Busted

fuel injectionDiesel cars are becoming increasingly popular in the United States. In fact, projections have the percentage of cars with diesel engines doubling from 3.2% of vehicles sold in 2012 to 6.4% in 2018.

Despite the new interest in these cars, however, a number of myths still permeate the minds of car buyers. And it’s a shame, considering the numerous benefits that come from diesel cars.

We’ve written this blog to help dispel some of the more pervasive misconceptions that surround diesel cars and help you better understand your vehicle.

    1. Diesel Is Dirty
      We’ve all seen a truck making its way down the highway with plumes of black smoke erupting out of its tailpipe. But with the most recent regulations passed on diesel engines, they actual emit less carbon than gasoline engines. That is because of the addition of the Diesel Particulate Filter, which helps remove visible smoke in newer models.


    1. Diesel Isn’t Efficient
      People think that diesel-powered cars are slow, which is mostly wrong. There is, however, one small point of fact to be made. Diesel engines tend to work best at lower revolutions per minute, or when the car is going under 65 miles per hour, whereas gasoline engines work better towards the top end of the spectrum. Considering most driving (and most towing) occurs below 65 miles per hour, diesel engines are more effective.


  1. Diesel Isn’t Good For Long Trips
    No one knows why this myth was started. Perhaps because people think that diesel is less widely available than gasoline, or because they think that diesel cars don’t adjust to different environments well. To the first point, there are constantly more diesel pumps available as more of the market turns to diesel engines. To the second, diesel cars actually perform better in a wide variety of conditions. Take high altitudes, for instance. While gasoline engines need to adjust to the decrease in oxygen in the engine, diesel can adjust oxygen intake and fuel injection to maximize performance.

The myths surrounding the uses of diesel fuel are many, but hopefully, this myth busting session has taken care of a few of the more common ones.

Dieselogic is a proud supplier of the best diesel fuel injectors. If you have questions about your diesel engine’s health or fuel injection system, contact us today.